package net;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ForkJoinPool;

/**
 * Creat by TanLei
 * Description:
 * User:86183
 * Date:2022-06-16
 * Time:13:51
 */
public class TcpThreadPoolEchoServer {
    private ServerSocket serverSocket = null;

    public TcpThreadPoolEchoServer(int port) throws IOException {
        serverSocket = new ServerSocket(port);
    }

    public void start() throws IOException {
        System.out.println("服务器启动！");
        ExecutorService pool = Executors.newCachedThreadPool();
        while(true){
            //Tcp相当于打电话
            Socket clientSocket = serverSocket.accept();
           pool.submit(()->processConnection(clientSocket));
        }
    }
    private void processConnection(Socket clientSocket){
        System.out.printf("[%s  : %d]"+"客服端建立连接!",clientSocket.getInetAddress().toString(),clientSocket.getPort());
        try(InputStream inputStream = clientSocket.getInputStream()){
            try(OutputStream outputStream = clientSocket.getOutputStream()){
                Scanner scanner = new Scanner(inputStream);
                while (true){
                    if(!scanner.hasNext()){
                        System.out.printf("[%s : %d]客户端断开连接！"+clientSocket.getInetAddress().toString(),clientSocket.getPort());
                        break;
                    }
                    String request = scanner.next();

                    String response = process(request);

                    PrintWriter writer = new PrintWriter(outputStream);
                    writer.println(response);
                    writer.flush();
                    System.out.printf("[%s : %d] req:%s , resp:%s\n",clientSocket.getInetAddress().toString(),clientSocket.getPort(),request,response);
                }
            }
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            try{
                clientSocket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public String process(String request) {
        return request;
    }

    public static void main(String[] args) throws IOException {
        TcpThreadPoolEchoServer server = new TcpThreadPoolEchoServer(9090);
        server.start();
    }
}
